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A vaccine used to prevent anal, cervical, vulvar, and vaginal cancer caused by human papillomavirus (HPV) types 16 and 18 and genital warts caused by HPV types 6 and 11. Gardasil is approved for use in males and females aged 9 to 26 years. It is a type of quadrivalent vaccine (a vaccine that works against four different viruses or other microorganisms). Also called recombinant human papillomavirus quadrivalent vaccine.